Question

Explain faraday experiment in detail.

Answer 1

Hint: Electromagnetic induction is a phenomenon in which the generation of an electromotive force occurs across a conductor when taken to a varying magnetic field. We can induce a current in a coil by moving it in a magnetic field or changing the magnetic field around it. It is acceptable in most situations to transfer the coil in a magnetic field.

Complete step-by-step solution:
Whenever the magnetic lines of forces in a circuit change, an emf is generated and induced emf. The phenomenon is known as electromagnetic induction. An induced current flow when the circuit is closed. This induced emf and current stay last only for a time while the magnetic flux variations.
The experiment is the induction from a magnet passing through a coil. Faraday utilized a cardboard tube with insulated wire twisted around it to form a coil for the experiment. A voltmeter was joined across the coil, and the induced EMF recorded as a magnet was passed through the coil.
There are some observations:
When the magnet is at rest in or near the coil, it means no voltage is observed.
The magnet moves toward the coil, some voltage measured, rising to a peak as the magnet nears the coil’s center.
When the magnet passes through the middle of the coil, voltage rapidly changes sign.
When the magnet moves out and away from the coil, voltage is measured in the reverse direction to the magnet’s initial case moving into the coil.
Result: The fixed magnet might produce a vast magnetic field; no EMF can be produced because the flux through the coil is not varying. When the magnet passes closer to the coil, the flux rapidly rises until the magnet is inside the loop. As it moves through the coil, the magnetic flux through the coil starts to decrease. The induced EMF is changed gradually.

Note:Faraday's Principle of Electromagnetic Induction says that the emf produced in a loop due to a dynamic magnetic flux is equal to the rate of variation of the magnetic flux wiring the loop. The magnetic flux threading of a wire loop can be changed by transferring a bar magnet in and out of the coil.